Tack driving mechanisms



Feb. 5, 1957 E. QUINN TACK DRIVING MECHANISMS Original Filed Nov. 9, 1951 5 Sheets-Sheet 1 Invcnfor cal-ward Quinn,

Feb. 5, 1957' TACK Original Filed Nov. 9. 195] E. QUINN 2,779,942

DRIVING MECHANISMS 5 Sheets-Sheet 2 136 P28 fldf f56-- Invenfor Edward Quinn Feb. 5, 1957 E. QUINN TACK DRIVING MECHANISMS 5 Sheets-Sheet 3 Original Filed Nov. 9, 1951 Inven for Edward Quinn Feb. 5, 1957 E. QUINN TACK DRIVING MECHANISMS 5 Sheets-Sheet 4 Original Filed Nov. 9, 1951 Feb. 5, 1957 E. QUINN TACK DRIVING MECHANISMS Original Filed Nov. 9. 1951 5 Sheets-Sheet 5 fiwenfor Edward Quinn United States Patent TACK DRIVING MECHANISMS Edward Quinn, Saugus, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Original application November 9, 1951, Serial No. 255,673, now Patent No. 2,740,138, dated April 3, 1956. Divided and this application January 17, 1955, Serial No. 482,291

4 Claims. (Cl. 1-18.1)

The present invention relates to fastening inserting mechanisms and is a division of United States Letters Patent No. 2,740,138, granted April 3, 1956 in my name. The invention is herein illustrated in its application to fastening inserting mechanisms in shoe mechines for securing bottom marginal portions of shoe upper materials to an insole on a last bottom. it is to be understood however that in certain aspects the invention is not limitedto its illustrated embodiment in shoe machinery but is applicable generally to fastening inserting mechanisms.

in shoe machines having tack driving mechanisms the tacks are usually driven by springs which are power energized and are held energized by a latch which is released by the operation of a cam to cause the tacks to be driven. in certain types of shoe machines it is desirable to provide for the alternative operation of the machine to effect the tack fastening of the upper materials to the insole or to effect the adhesive attachment of the upper materials to the insole. With this in view it is an object of the present invention to provide in a machine of the type above referred to an organization which permits the operation of upper shaping instrumentalities while the tack driving mechanism is held inoperative. To this end breakable connections are provided between the tack drum and its actuator, said connections including a connecting pin movable to and from connecting position, and the cam which causes the tacks to be driven is operative only when the connecting pin is in its connecting position. In the illustrated organization means, herein illustrated as a hand lever, is provided for retracting the pin. In accordance with a further feature of the invention the same means operates during the retraction of the pin to advance an arrester which operates to hold the tack driving means inoperative.

The invention will now be described with reference to the accompanying drawing illustrating a preferred embodiment thereof and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a front elevation illustrating a fastening inserting mechanism of the type illustrated in United States Letters Patent No. 2,659,241, granted November 3, 1936, on an application filed in the name of Jacob C. lorgensen;

Fig. 2 is a right side elevation illustrating features of the organization illustrated in Fig. l;

3 is a section taken on the line III-ill of Fig. I;

Fig. 4is a front elevation illustrating features of the tack handling and tack driving mechanism with the tack pot and the tack separating and delivering mechanisms removed from the machine;

Fig. 5 is a detail view of the cam for oscillating the tack pot;

Fig. 6 is a right side elevation illustrating particularly the mechanism for loading the tack driving springs; and

Fig. 7 is a. detail view of the cam mechanism shown in Fig. 6 looking from the left of Fig. 6.

As illustrated in the drawings the present invention is embodied in an automatic machine combining means for lasting the heel end portions of shoes and means for driving tacks to secure the overlasted margins of shoe upper materials to their insoles. Such a machine is illus trated in the Jorgensen patent hereinbefore referred to, to which patent reference may be had for a description of those features of the tack driving mechanism not described herein.

In the organization illustrated in the drawings tacks are driven by pins 13 mounted in and projecting downwardly from a head 12 which, as shown in Fig. 4-, is slidably mounted for vertical movement in a guideway 14 formed in a block 16. Mechanism now to be described imparts downward movement to the head 12 thereby to drive the tacks through the overwiped margin of the upper, the flange of the counter, the inwardly extending margin of the lining, and the margin of the insole and to clench the tacks against a metal plate on the heel portion of the last bottom. Referring to Fig. 4, two springs 18 are energized by compression to provide the power for the tack, driving operation which takes place upon the release of a latch member 2d (Figs. 6 and 7). For compressing the springs an actuator herein illustrated as a cam 22. is fixed to a cam shaft 24 and arranged to engage a roll 26 mounted in the bifurcated lower portion of a head 23 slidably mounted for vertical movement in a guideway formed in a fixed bracket 3d and fixed to the lower end portion of a shaft 32 slidably mounted in a bearing in bosses 34 projecting respectively upwardly and downwardly from a table 36. Referring to Figs. 4 and 6, the sliding shaft 32 has fixed thereto a crosshead 38 the opposite end portions of which are connected by links 40 to the free ends of arms 42 fixed to rock shafts 44 to which there are also fixed outwardly extending arms 46 which have pivotally mounted on their free ends heads 48 at the upper ends of shafts 50 on which are mounted the tack driving springs 18. Each of the shafts 50 extends through a bearing in a block 52 provided with trunnion pins 54- mounted in grooves in the upper portion of a boss 56 projecting upwardly from the table 36. At its forward end each of the shafts 44 has fixed thereto and arranged to extend inwardly therefrom an arm 58 which is connected by a link 60 to an offset portion 62 of the head 12. The latch member 20 (Figs. 6 and 7) is fixed to the upper end portion of a lever 64 pivotally mounted on a pin 66 projecting rearwardly from the bracket 30. The latch member bears against a shoulder 68 formed in a split clamp 70 on the shaft 32. The latch member is brought into position to engage the shoulder 68 by the action of gravity on the lower portion of the lever 64 when the shaft 32 is at the limit of its upward movement. For disengaging the latch member from said shoulder 68 to permit the springs 18 to drive the tacks a cam '72 is fixed to the shaft 24 and arranged to engage a roll 74 mounted in the inturned lower end portion of the lever 64.

For supplying tacks to the driving instrumentalities hereinbefore described the illustrated machine is provided with a tack drum 76 (Fig. 4) of known construction. The tack drum is fixed to a rockshaft 78 mounted in a bearing in a standard 80 fixed to an elevated platform 82. In the operation of the machine the drum is rotated 360 in a counterclockwise direction as seen in Fig. 4, then 360 in a clockwise direction. For rotating the tack drum an actuator herein illustrated as a cam 84 (Fig. 5) is fixed to a shaft 86, said cam having a groove 88 in which is positioned a roll 90 pivotally mounted at the lower end of a vertical slide 92 which is mounted in a guideway formed in a bracket 94 secured to the table 36. Pivotally mounted between ears 96 projecting outwardly from the slide 92 is a head 98 at the lower end of a link the upper end of which is pivotally connected to a rocker lever 102 (Fig. I) mounted to swing on a fixed fulcrum 104. Pivotal'ly mounted at the inner end of the lever 102 is a link 106 (Fig. 4) which has a breakable connection to a link 108 pivotally mounted at its upper end on an arm 11f?- projecting laterally from the hub of a gear segment 112 pivotally mounted at 114 on a standard 116. The gear segment meshes with a pinion 118 fixed to a shaft 120 to which there is also fixed a spur gear 122 which meshes with a spur gear 124 fixed to the drum shaft 78. In order to prevent rotation of the tack drum when the machine is operated without driving tacks a hand lever 126 is pivotally mounted on a headed screw 128 and connected to mechanism now to be described for breaking'the connection between the two links 106 and Referring to Fig. 3, the hand lever 126 is slotted to rcceive a headed screw 130 projecting upwardly from a sliding bar 132 mounted in a g-uideway in a fixed horizontal plate 134. Referring to Fig. 2, the sliding bar 132 has a downwardly bent rear portion 136 to which is fixed a plate 138. Referring to Fig. 4, said plate 138 has an arcuate slot 140 in which is mounted the peripherally grooved head 142 of a connecting pin 144. Referring to Fig. 2, the pin is slidably mounted in a bore 146 in a head 148 at the lower end of the link 108. As shown in Fig. 2, the sliding bar 132 is at the limit of its forward movement and the pin is partially retracted from the head 148. With the pin in this position the link 106 slides freely in a vertical bore 150 in the head and the tack drum is not rotated. When it is desired to rotate the tack drum the hand lever is operated to move the sliding bar rearwardly thereby to move the pin 144 through a bore 152 in the link 166 in order to cause the two links 106 and 108 to move as a unit in the next succeeding cycle of the machine. Referring to Fig. 6, forward movement of the sliding bar to disengage the pin from the link 106 brings two fingers 154 projecting forwardly from the end of the downturned rear part 136 of the sliding bar 132 into a position just beneath a collar 156 fixed to the upper end of the shaft 32 thereby preventing the operation of the tack driving mechanism.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a shoe machine, the combination of a tack driver, means for actuating the tack driver, an arrester for preventing the actuation of the driver, a tack drum for supplying the driver, an actuator for rotating the tack drum, operating connections from the actuator to the drum including an element which is retractable in order to break said operating connections, a hand lever, and connections from the hand lever which operate first to retract said element thereby to render the drum inoperative and second to advance the arrester into operative position thereby to prevent the actuation of the tack driver.

2. In a shoe machine, the combination with a tack driver and a tack drum from which the driver is sup plied, of a cam for rotating the drum, operating connections from the cam to the drum including a connecting pin, a slide on which the connecting pin is mounted, manually operated means for moving the slide in one direction to advance the pin into operative position and for moving the slide in another direction to retract the pin into an inoperative position, and a cam operative only when the pin is in its operative position to cause the actuation of the tack driver.

3. In a shoe machine, a plurality of tack driving pins, means for driving the pins, an arrester for preventing the driving of the pins, means for energizing the driving means, a tack drum for supplying tacks to the driving pins, a cam for rotating the drum, operating connections from the cam to the drum including a connecting pin, and means for retracting the connecting pin and advancing the arrester into operative position.

4. In a shoe machine, the combination of a tack driver, a spring for actuating the driver, a tack drum for supplying the driver, a cam for rotating the drum, operating connections from the cam to the drum including a connecting pin, a slide on which the connecting pin is mounted, an arrester on the slide for preventing the actuation of the tack driver, means for moving the slide in one direction to advance the pin into operative position and to retract the arrester and in the opposite direction to advance the arrester into operative position and to retract the pin, and a cam operative only when the arrester is retracted for energizing the spring.

References Cited in the file of this patent UNITED STATES PATENTS 1,342,415 Benjamin June 8, 1920 1,821,966 Goddu Sept. 8, 1931 

